Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb12e7d835697b3…

MALICIOUS

PDF

46.5 KB Created: 2020-07-23 23:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83d26d8d1cc3ca1bf8ec351b9a074a70 SHA-1: 5faa7e84cbaed5accbc48a28f9cce0195b096cb1 SHA-256: cdb12e7d835697b3cd387361c328a5c9711c4449a58e50a7ca2ddc29a7890571
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.com, disguised as a search result for 'open pdf online android'. It also includes a large number of links to other PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The embedded URLs are the primary indicators of malicious intent, directing users to potentially harmful content.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=open%20pdf%20online%20android
    • http://files.illinoisdelta.org/uploads/1/3/2/6/132681938/2186787.pdf
    • http://files.crystalwrightdesign.com/uploads/1/3/1/4/131438330/d769f58389.pdf
    • http://files.sophia-speaks.com/uploads/1/3/1/4/131455832/sigafowusuke.pdf
    • http://files.grichardpotts.com/uploads/1/3/1/3/131384656/f8e9f.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/fonanebedirubonuxot.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/zerapekiduzex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0951/files/16916263478.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/23176498981.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/28821992689.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/vitegekunew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/89236355333.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/ribofoxezavudutafelud.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/nibuvapufapifefezitixexuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/70162083926.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007574.bin
2bf3efc0e3b2daabd2a6951121a939823af2b508a262e0b073296ce9444c2273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7574 4592 bytes
font_01_sfnt_off00008512.bin
62bba2044695ff6c6858b7d5519d0aa0d2b70647b1be55d524fb1173341847b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8512 12316 bytes

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